Overrunning preventer for winding machines



May 4, 192a. 1,583,526

H. E. BRYANT OVERRUNNING PREVENTER FOR wmbme MACHINES Filed Sept. 16, 1925 v Preventers for Winding Machines, of which Patented May 4, 1926.

UNITED stares Parent rFicE.

HENRY E. BRYANT, OF PROVIDENCE, RHODE ISLAND, ASSIGNOR TO TUBULAR WOVEN FABRIC COMPANY, OF PAWTUQKET, RHODE ISLAND, A CORIPOPJATION OF RHODE ISLAND.

Application filed September 16, 1925. Serial No. 56,705.

To all whom z't mag/concern:

Be it knownthat I, HENRY E. BRYANT, a citizen of the United States, residing at Providence, in the county of Providence and State of Rhode Island, have invented new and useful Improvements in .Overrunning the following is a specification.

The present invention relates to machines for winding filamentous or strip material by the action of a rotating winding head carrying a supply of such material on an inde pendently rotatable spool or the like. Its

object is to prevent continued rotation of the spool after the winding head has been abruptly stopped or quickly retarded. For instance, assuming that the winding head is a normally rotated at high speed, and that the v machine is equipped. with a brake or other stop motion device for quickly arresting the motion of the head when some untoward accident occurs, such as breaking of the stock being wound or its failure to be fed properly to the winding point then it is desirable to stop the rotation of the stockholdng spoolor reel also as soon as possible in order to prevent unwinding and snarling of the stock supply, or other danger liable Y to resultfrom continued free rotation of the supply spool. i

I have accomplished this object by providing in connection with the winding head and supply spool, in a machine of the character above indicated, an automatic stop or clutch device which is inoperative so long as the winding head continues to operate in its normal manner, and becomes operative instantly to arrest the spool when the winding head is itself arrested The embodiment of the invention herein illustrated has been The drawings providedherein referred to. It is to be understood,

use with that specific machine, but is applicable also to other machines which include a rotating winding head, an independently rotatable spool or equivalent stockholder, and mcans for stopping the winding head.

In the drawings; y

Figure 1 is a side elevation, with a part of the winding head broken away and shown in section, of the machine above referred to having one embodiment of my invention applied thereto Fig. 2 is a front elevation'of a part of the winding head anda part of the spool with a clutch embodying the present invention in operative association therewith;

Fig. 8 is a sectional elevationtaken on line 33 of Fig. 2 looking inthe direction The part of the machine which I havecalled the winding head is that designated It is by the numeral 21 in the drawings. secured on one end of a shaft 22 which rotates in bearings and 24 on a base or frame 25. Such head may be driven by any suitable means, such as a motor 26 mounted on the frame 25 andhaving a shaft which is coupled with the shaft 22 by a belt or chain 27 and complemental pulleys or sprocket wheels. i

The winding head. s cylindrical in form,

having an end Wall 29 and anouter side wall 30. It also has an interior cylindrical bearing surface 31, the said outer wall'and bearing being coaxial with the shaft 22. In the annular space between the bearing 31 and the wall 30 is a spool holding the stock 32 and having a hub 38 surrounding and rotatable upon the bearing surface 31, and

a flange, or base 84 Learingagainst end wall however, that the invention is not limited to Figure 2.

29 or against roller bearings mounted in said end wall. The stock as drawn from the spool and carried around a guide roll 35, mounted on the head, and led thence to the vinding point. The head is also equipped with stock feeding, forming and laying devices, for a full disclosure of which reference may be had to the aft resaid application but as such disclosure is not essential to an explanation of the present invention, it is not repeated herein. The requirements of the present disclosure are met by the explanation that the winding head is rotatable and that the stock-holding spool is carried by the head and is independently rotatable relatively thereto about the same axis.

The stock shown illustratively herein is a metallic strip or ribbon wound in the form of a coil and mounted on the spool, surrounding the hub'33 thereof and bearing against the face of flange 34; Such showing, however, is illustrative and typical rather than exclusive. The term spool which I have used herein" is a generic term intended to include any device similar or equivalent to the so-called spool herein illustrated and adapted to hold a supply of stock in coil form.

7 When the winding head is rotated to form the stock into the article of manufacture which is the final product of the machine, the spool is rotated also in the same abso lute direction, meaning by absolute direction the direction with respect to the sta tionary parts of the machine and other ob jects, but at a different speed, the speed differential being due to the delivery, of stock from the spool to supply the demands of the manufactured article or goods. Thus the spool rotates relatively to the winding head, and the direction of such relative rotation may be the same as, or opposite to, the direction in which the stock is wound to form the coilcarried by the spool. The rotation of the head is much more rapid than the relative rotation of the spool, hence when the head is suddenly stopped the spool tends to continue on in the direction of its absolute rotation whether the relative rotation is in the same or the opposite direction. Such continued rotation or overrunning of the spool is liable to have more or less objectionable and ser'ious results, well under stood by those acquainted with the art. The object and accomplishment of the invention is to prevent such overrunning.

The direction of rotation of the winding head when winding the stock in the form of a right-hand helix is that indicated by the arrow A in Figure 1 and the arrow B in p The coil of strip material is applied to the spool in such a manner that as it is drawn off-to satisfy the demands of the "manufactured goods for the stock, it causesfthe relative rotation of the spool to take place in the direction indicated by the arrow in Figure 1 and the arrow D in Figure 2. The direction of such relative rotation is opposite to the direction of rotation of the head. Nevertheless the speed of winding is so much greater than the speed of such relative rotation that the absolute rotation of the spool, by which I mean its rotation relatively to the stationary parts of the machine and to other objects, is in the same direction as that of the head. It

follows, then, that when the head is suddenly arrested, so that its rate of rotation is greatly reduced, if not instantly stopped, the direction of relative rotation of the spool is reversed, due to the slowing down of the head while the spool continues torotate with substantially undiminished velocity due to its momentum. of relative rotation to effect clutching of the spool and head together when the head is arrested or stopped.

A friction clutch is interposed between the winding head and the spool, said clutch comprising a member 36 adapted to bear on the spool, a holder 37 secured to the winding head and having cam elements 38, and'pressure transmitting rollers 39 between the cam elements 38 and the member 36. The member 36 bears on the forward surface of the flange or base portion 34 of the spool, and preferably is provided with a facing of frictional material at the side next to said flange. It forms the primary clutch member adapted to apply to the spool sufficient friction to prevent the latter from moving independently of the head. It is placed in a position where it is overhung by the cam members 38. Said cam members are integral with, or otherwise attached to, the holder 37;and said holder is bolted to the inner side of the outer wall of the winding head. The transmission rolls 39 are confined between lugs 40 on the primary clutch member '36 and are directly under or back of the cam members 38. Said cam members are both inclined in the same direction so as to act in substantially like manner on the rolls.

VVhen the winding head turns in the normal manner and at the normal speed, the surfaces of the cams recede from the rolls 39. The extent of such recession is limited by a stop 41 on the primary clutch arranged to extend across a shoulder on one of the cams 38, so that the clutch member 36 remains in association with the cams while the spool moves past it in the relatively opposite normal direction of rotation. But when the winding head is arrested, with resulting reversalin the direction of relative rotation of the spool and tendency of the spool to run ahead,the cam surfaces bear against the rolls and, through the latter, press the clutch member36 against the spool. The'c'ams and rolls "act in the manner of 'afiol'le'r clutch to I make use of this reversalprevent any overrunning thereof. The en tire clutching means thus consists of the pri mary friction clutch 36 and the roller clutch or clutches comprisedby the rolls 39 and cams 38.

The primary clutch member 36 is also preferably applied to exert a constant frictional drag on the spool so as to insure that the spool will be set in rotation when the machine is started up, and will continue in rotation with maintenance of suflicient tension on the stock while the machine continues in operation. Springs 42 are provided for thus constantly pressing the primary clutch member against the spool, such springs reacting against adjustable screws 43 held by lugs 44: projecting from the holder 37, such screws acting through disks 45 which engage with the springs. Each spring and its pressure applying disk are confined in a cup 46 or equivalent guide on the friction member. The disks 45 present a substantially wider areathan the ends of. the screws, whereby the screws are adapted to move over the disks, with continued pres sure application thereon, when such relative motion occhrs between the cam holder and the primary clutch as is-necessary and suffici'entto apply and release pressure through the rolls 39.

It may be understood without special illustration that I may if necessary provide means similar to the stop 41, mounted either on the primary clutch member or on the holder, and positioned to coact with shou1- ders on the other of said members so as to retain the primary clutch member'from displacement radially. Other means to the same end may be provided by the designer within the scope inwhich I claim protection.

The clutching means herein disclosed is independent of themeans for arresting the winding head, and will operate to prevent overrunning of the spool whenever the head. is checked, whatevermeans are applied for the purpose whether automatic or manual. In Figure 1. there is indicated at 48 a device for arresting the head, which device maybe the same as that shown for the purpose in my prior application Serial N0.s9,782, or a different device, and which typifies generally a means for that purpose. But since the spool clutching means of this invention is independent of the head stopping means, no description of any such stopping means is required for this disclosure. v

The device hereinbefore described embodies one form or species of my generic invention in means to prevent overrunning of the supplyspool in a winding machine. Other embodiments or species of the invention are disclosed in applications for patent filed concurrently herewith. The present species is distinguished from the others n that it accomplishes the purpose by thefuse of a friction clutch; and further in the fact'that the same friction clutch also serves as means rornorma-lly' applying traction to the spool,

while the clutch means of the said other species are independent of the traction means with which the machine maybe equipped.

Having thus described the principles and one specific embodiment of the invention, although without attempting to describe all possible forms of the invention or all of its modes of use, I declare that what I claim and desire to secure by Letters Patent is:

1. In a winding machine including a rotatable winding head and an independently rotatable spool for the material to be wound, friction means. between said head and spool normally resisting relative rotation of the spool, and means for progressively increasing the pressure of said friction means with occurrence and progress of relative movement between the head and spool in one direction.

2. In a winding machine having a rotatable winding head an independently rotatable stock holding spool carried by said head, a traction member connected to the head and bearing frlctlonally on the spool, and means for inc-reaslng the pressure of sald traction member in consequence of a reversal 1n the direction of relatlve movement between the spool and head.

3. In a wmdmg machine of the character described arotatable winding head, an 111- dependently rotatable and coaXially ar-,

ranged supply spool, a frictional traction member connected with one of the before named parts and bearing against acomplemental surface of the other of said parts, and a secondary pressure applying means constructed to increase the contact pressure between said traction member and the surface with which it is engaged in response to a relative movement between the other of said machine parts and the traction member.

4. A winding'machine comprising a rotating winding head, a coaxially arranged and independently rotatable supply spool, a primary friction clutch member engaged with one of the parts constituting said head and spool so as to partake of the movement thereof, and having frictional sliding engagement with the other of said parts, and means for increasing the friction causing pressure between said clutch member, and the lastnamed part comprising a cam device affixed 'to the first named part and transmission means between said cam device'and the friction clutch.

5. A winding machine comprising a rotatable windinghead, an independently rotatable andcoaxially arranged supply spool, a friction clutch member engaged with the head in a manner to cause it to move in unison with the head, but having provision for a limited extent of movement relatively to the head, said friction clutch member being normally in sliding engagement with the surface of the spool, and pressure applying means for increasing the pressure between the clutch member and the spool When the clutch member is so moved relatively to the head. r

In testimony whereof I have affixed my signature.

HENRY E. BRYANT. 

